[][src]Trait quote::ToTokens

pub trait ToTokens {
    fn to_tokens(&self, tokens: &mut TokenStream);

    fn into_token_stream(self) -> TokenStream
    where
        Self: Sized
, { ... } }

Types that can be interpolated inside a quote! invocation.

Required Methods

Write self to the given TokenStream.

The token append methods provided by the TokenStreamExt extension trait may be useful for implementing ToTokens.

Example

Example implementation for a struct representing Rust paths like std::cmp::PartialEq:

extern crate quote;
use quote::{TokenStreamExt, ToTokens};

extern crate proc_macro2;
use proc_macro2::{TokenTree, Spacing, Span, Punct, TokenStream};

pub struct Path {
    pub global: bool,
    pub segments: Vec<PathSegment>,
}

impl ToTokens for Path {
    fn to_tokens(&self, tokens: &mut TokenStream) {
        for (i, segment) in self.segments.iter().enumerate() {
            if i > 0 || self.global {
                // Double colon `::`
                tokens.append(Punct::new(':', Spacing::Joint));
                tokens.append(Punct::new(':', Spacing::Alone));
            }
            segment.to_tokens(tokens);
        }
    }
}

Provided Methods

Convert self directly into a TokenStream object.

This method is implicitly implemented using to_tokens, and acts as a convenience method for consumers of the ToTokens trait.

Implementations on Foreign Types

impl<'a, T: ?Sized + ToTokens> ToTokens for &'a T
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impl<'a, T: ?Sized + ToTokens> ToTokens for &'a mut T
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impl<'a, T: ?Sized + ToOwned + ToTokens> ToTokens for Cow<'a, T>
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impl<T: ?Sized + ToTokens> ToTokens for Box<T>
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impl<T: ToTokens> ToTokens for Option<T>
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impl ToTokens for str
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impl ToTokens for String
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impl ToTokens for i8
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impl ToTokens for i16
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impl ToTokens for i32
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impl ToTokens for i64
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impl ToTokens for isize
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impl ToTokens for u8
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impl ToTokens for u16
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impl ToTokens for u32
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impl ToTokens for u64
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impl ToTokens for usize
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impl ToTokens for f32
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impl ToTokens for f64
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impl ToTokens for char
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impl ToTokens for bool
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impl ToTokens for Group
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impl ToTokens for Ident
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impl ToTokens for Punct
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impl ToTokens for Literal
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impl ToTokens for TokenTree
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impl ToTokens for TokenStream
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Implementors